10239( 3) - 05/17/04 11:30 - [ 1] PROPOSAL FOR HUBBLE SPACE TELESCOPE OBSERVATIONS ST ScI Use Only ID: 10239 Version: 3 Check-in Date: 17-May-2004 15:27:58 1.Proposal Title: A Multiwavelength Study of POX 52, a Dwarf Seyfert Galaxy with an Intermediate-Mass Black Hole ------------------------------------------------------------------------------------ 2. Proposal For 3. Cycle 4. Parallel Pointing Tolerance GO 13 ------------------------------------------------------------------------------------ 5. Investigators Contact? PI: Dr. Aaron J. Barth California Institute of Technology CoI: Dr. Luis C. Ho Carnegie Institution of Washington N CoI: Dr. Robert Rutledge McGill University N ------------------------------------------------------------------------------------ 6. Abstract We propose a comprehensive optical, UV, and X-ray investigation of the unique galaxy POX 52. POX 52 is a Seyfert 1 galaxy with unprecedented properties: its host galaxy appears to be a dwarf elliptical, and its stellar velocity dispersion is only 36 km/s. The stellar velocity dispersion and the broad emission-line widths both suggest a black hole mass of order 10^5 solar masses, placing POX 52 in a region of AGN parameter space that is almost completely unexplored at present. We request ACS/HRC imaging to perform a definitive measurement of the host galaxy structure; STIS UV and optical spectroscopy to study the nonstellar continuum and the structure of the broad-line region; and Chandra ACS imaging to detect the X-ray emission from the nucleus and investigate its spectral and variability properties. The results of this program will give a detailed understanding of the host galaxy and accretion properties of one of the very few known black holes in the mass range around 10^5 solar masses. ------------------------------------------------------------------------------------ 10239( 3) - 05/17/04 11:30 - [ 2] Observations Description ------------------------ Our program has two parts: ACS/HRC imaging and STIS spectroscopy. ACS/HRC imaging: We have 2 orbits for imaging, one in F814W and one in F435W. In each orbit we will do a short 100-sec single exposure, and then a standard 4-point ACS-HRC-DITHER-BOX pattern. STIS spectroscopy: We will obtain a complete, low- resolution UV/optical spectrum of POX 52 in a single visit with 4 orbits, using the 0.2" long slit. We will do a standard point-source acquisition since the target is dominated by the AGN point source. In each spectral setting we will do a 2-point STIS-ALONG-SLIT dither pattern to exclude bad pixels. We will observe the object using the FUV-MAMA+G140L, NUV-MAMA+G230L, CCD+G430L, and CCD+G750L(7751). For the G750L observation we will obtain a fringe flat at the end of the orbit. Just to be absolutely sure of the coordinates for the STIS acquisition, and to double-check the acquisition exposure time, we request that the STIS observation be put "on hold" until the ACS/HRC observation takes place, so that we can examine the ACS/HRC image. Once we have the ACS/HRC image, we can quickly measure the position and magnitude of the object and confirm the STIS observation plans. Real Time Justification ----------------------- Calibration Justification ------------------------- Additional Comments ------------------- ------------------------------------------------------------------------------------ 10239( 3) - 05/17/04 11:30 - [ 3] TARGET LIST Fixed Targets ------------------------------------------------------------------------------------------------------------------------------------ Tar| Target | Target | Target |Coord | Radial | Flux data No | Name | Description | Position |Eqnx | Vel. | ------------------------------------------------------------------------------------------------------------------------------------ 1 POX52 GALAXY, DWARF RA=12H02M56.87S +/- 0.5", DEC=- J2000 V = 17.2+/-0.2 ELLIPTICAL, NUCLEUS, 20D56'3.2" +/- 0.5", PLATE- SEYFERT ID=04UV Coordinate Source: GSC_SURVEY_PLATE Comments: Note: the coordinates listed in the SIMBAD database for POX52 are INCORRECT. The correct coordinates are listed in NED. Coordinates given here were measured from a GSC image and agree closely with the NED coordinates. 10239( 3) - 05/17/04 11:30 - [ 4] Patterns ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 1 Primary_Pattern Secondary_Pattern Pattern_Type ACS-HRC-DITHER-BOX Pattern_Purpose DITHER Number_Of_Points 4 Point_Spacing 0.15 Line_Spacing 0.098 Coordinate_Frame POS-TARG Pattern_Orient 19.89 Angle_Between_Sides 63.5 Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ Pattern_Number: 2 Primary_Pattern Secondary_Pattern Pattern_Type STIS-ALONG-SLIT Pattern_Purpose DITHER Number_Of_Points 2 Point_Spacing 0.15 Line_Spacing Coordinate_Frame POS-TARG Pattern_Orient 90.0 Angle_Between_Sides Center_Pattern NO ------------------------------------------------------------------------------------------------------------------------------------ 10239( 3) - 05/17/04 11:30 - [ 5] Visit: 10 Visit Priority: Visit Requirements: PCS MODE FINE On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 POX52 ACS/HRC ACCUM HRC F814W CR-SPLIT=NO,GAIN=2 1 101 S ------------------------------------------------------------------------------------------------------------------------------------ 2 POX52 ACS/HRC ACCUM HRC F814W CR-SPLIT=NO,GAIN=2 1 590 S EXPAND; PATTERN 1 2 ------------------------------------------------------------------------------------------------------------------------------------ 3 POX52 ACS/HRC ACCUM HRC F435W CR-SPLIT=NO,GAIN=2 1 100 S ------------------------------------------------------------------------------------------------------------------------------------ 4 POX52 ACS/HRC ACCUM HRC F435W CR-SPLIT=NO,GAIN=2 1 622 S EXPAND; PATTERN 1 4 ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 10 1 none none none none 1 tbd 10 2 1 none none none 1 tbd 10 2 2 none none none 1 tbd 10 2 3 none none none 1 tbd 10 2 4 none none none 1 tbd 10 3 none none none none 2 tbd 10 4 1 none none none 2 tbd 10 4 2 none none none 2 tbd 10 4 3 none none none 2 tbd 10 4 4 none none none 2 tbd 10239( 3) - 05/17/04 11:30 - [ 6] Visit: 20 Visit Priority: Visit Requirements: PCS MODE FINE; ON HOLD FOR 10 On Hold Comments: On hold until the ACS/HRC imaging visit takes place, so that we can double- check the coordinates of the nucleus and optimize the target acquisition. Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 POX52 STIS/CCD ACQ F28X50LP MIRROR 1 5 S ------------------------------------------------------------------------------------------------------------------------------------ 2 POX52 STIS/NUV ACCUM 52X0.2 G230L 2376 1 1095 S EXPAND; PATTERN 2 2 -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 3 POX52 STIS/NUV ACCUM 52X0.2 G230L 2376 1 488 S EXPAND; PATTERN 2 3 -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 4 POX52 STIS/CCD ACCUM 52X0.2 G430L 4300 CR-SPLIT=NO,GAIN=1 1 250 S PATTERN 2 4 ------------------------------------------------------------------------------------------------------------------------------------ 5 POX52 STIS/CCD ACCUM 52X0.2 G750L 7751 CR-SPLIT=NO,GAIN=1 1 250 S PATTERN 2 5 ------------------------------------------------------------------------------------------------------------------------------------ 6 CCDFLAT STIS/CCD ACCUM 52X0.2 G750L 7751 2 DEF ------------------------------------------------------------------------------------------------------------------------------------ 7 POX52 STIS/FUV ACCUM 52X0.2 G140L 1425 1 1358 S EXPAND; PATTERN 2 7 -MAMA ------------------------------------------------------------------------------------------------------------------------------------ 8 POX52 STIS/FUV ACCUM 52X0.2 G140L 1425 1 1400 S EXPAND; PATTERN 2 8 -MAMA ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 20 1 none none none none 1 tbd 20 2 1 none none none 1 tbd 20 2 2 none none none 1 tbd 20 3 1 none none none 2 tbd 20 3 2 none none none 2 tbd 20 4 1 none none none 2 tbd 20 4 2 none none none 2 tbd 20 5 1 none none none 2 tbd 20 5 2 none none none 2 tbd 20 6 none none 1 none 2 tbd 20 6 none none 2 none 2 tbd 20 7 1 none none none 3 tbd 20 7 2 none none none 3 tbd 20 8 1 none none none 4 1415.0 10239( 3) - 05/17/04 11:30 - [ 7] Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Visit Id| Exp Id |Primary |Secondary |Iteration |CR-SPLIT |Orbit Num |Duration | |Pattern Pos |Pattern Pos |Num |Num | | ------------------------------------------------------------------------------------------------------------------------------------ 20 8 2 none none none 4 1415.0 10239( 3) - 05/17/04 11:30 - [ 8] Summary Form for Proposal 10239 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures HRC F28X50LP 52X0.2 ------------------------------------------------------------------------------------------------------------------------------------ Configurations ACS/HRC STIS/CCD STIS/NUV-MAMA STIS/FUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes ACCUM ACQ ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters CR-SPLIT=NO GAIN=2 GAIN=1 ------------------------------------------------------------------------------------------------------------------------------------ Proposal Category GO ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements PCS MODE FINE EXPAND; PATTERN 1 2 EXPAND; PATTERN 1 4 PCS MODE FINE; ON HOLD FOR 10 EXPAND; PATTERN 2 2 EXPAND; PATTERN 2 3 PATTERN 2 4 PATTERN 2 5 EXPAND; PATTERN 2 7 EXPAND; PATTERN 2 8 ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements F814W F435W MIRROR G230L G430L G750L G140L ------------------------------------------------------------------------------------------------------------------------------------ Target Names POX52 CCDFLAT ------------------------------------------------------------------------------------------------------------------------------------ Wavelengths 2376 4300 7751 1425 ------------------------------------------------------------------------------------------------------------------------------------